/usr/share/ncarg/hluex/ngmath/nm05c.c is in libncarg-data 6.4.0-9.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* $Id: nm05c.c,v 1.7 2010-03-15 22:49:24 haley Exp $
*/
/************************************************************************
* *
* Copyright (C) 1997 *
* University Corporation for Atmospheric Research *
* All Rights Reserved *
* *
************************************************************************/
/*
* File: nm05c.c
*
* Author: Mary Haley (taken from one of Fred Clare's examples)
* National Center for Atmospheric Research
* PO 3000, Boulder, Colorado
*
* Date: Tue Dec 16 10:05:38 MST 1997
*
* Description: How to vary the exponent of the distances in a
* 2D interpolation.
*/
#include <stdio.h>
#include <ncarg/ncargC.h>
#include <ncarg/gks.h>
#include <ncarg/ngmath.h>
#include <math.h>
#include <ncarg/hlu/App.h>
#include <ncarg/hlu/NcgmWorkstation.h>
#include <ncarg/hlu/PSWorkstation.h>
#include <ncarg/hlu/PDFWorkstation.h>
#include <ncarg/hlu/CairoWorkstation.h>
#define NUM 6
#define NX 61
#define NY 61
int main()
{
int appid,wid,gkswid;
int srlist, grlist;
const char *wks_type = "ncgm";
int i, j, ier;
float xi[] = {0.00, 1.00, 0.00, 1.00, 0.40, 0.75};
float yi[] = {0.00, 0.00, 1.00, 1.00, 0.20, 0.65};
float zi[] = {0.00, 0.00, 0.00, 0.00, 1.25, 0.80};
float xo[NX], yo[NY], xinc, yinc, *output, outr[NY][NX];
float rho = 3., theta = -45., phi = 55.;
/*
* Create the output grid.
*/
xinc = 1./ (float) (NX-1);
yinc = 1./ (float) (NY-1);
for (i = 0; i < NX; i++) {
xo[i] = xinc * (float) i;
}
for (j = 0; j < NY; j++) {
yo[j] = yinc * (float) j;
}
/*
* Exponent equals 0.5
*/
c_dssetr("exp", 0.5);
output = c_dsgrid2s(NUM, xi, yi, zi, NX, NY, xo, yo, &ier);
if (ier != 0) {
printf(" Error %d returned from nm05c\n",ier);
exit(1);
}
/*
* Initialize the high level utility library
*/
NhlInitialize();
/*
* Create an application context. Set the app dir to the current directory
* so the application looks for a resource file in the working directory.
* In this example the resource file supplies the plot title only.
*/
srlist = NhlRLCreate(NhlSETRL);
grlist = NhlRLCreate(NhlGETRL);
NhlRLClear(srlist);
NhlRLSetString(srlist,NhlNappUsrDir,"./");
NhlCreate(&appid,"nm05",NhlappClass,NhlDEFAULT_APP,srlist);
if (!strcmp(wks_type,"ncgm") || !strcmp(wks_type,"NCGM")) {
/*
* Create a meta file workstation.
*/
NhlRLClear(srlist);
NhlRLSetString(srlist,NhlNwkMetaName,"./nm05c.ncgm");
NhlCreate(&wid,"nm05Work",
NhlncgmWorkstationClass,NhlDEFAULT_APP,srlist);
}
else if (!strcmp(wks_type,"x11") || !strcmp(wks_type,"X11")) {
/*
* Create an X workstation.
*/
NhlRLClear(srlist);
NhlRLSetInteger(srlist,NhlNwkPause,True);
NhlCreate(&wid,"nm05Work",NhlcairoWindowWorkstationClass,NhlDEFAULT_APP,srlist);
}
else if (!strcmp(wks_type,"oldps") || !strcmp(wks_type,"OLDPS")) {
/*
* Create an older-style PostScript workstation.
*/
NhlRLClear(srlist);
NhlRLSetString(srlist,NhlNwkPSFileName,"./nm05c.ps");
NhlCreate(&wid,"nm05Work",NhlpsWorkstationClass,NhlDEFAULT_APP,srlist);
}
else if (!strcmp(wks_type,"oldpdf") || !strcmp(wks_type,"OLDPDF")) {
/*
* Create an older-style PDF workstation.
*/
NhlRLClear(srlist);
NhlRLSetString(srlist,NhlNwkPDFFileName,"./nm05c.pdf");
NhlCreate(&wid,"nm05Work",NhlpdfWorkstationClass,NhlDEFAULT_APP,srlist);
}
else if (!strcmp(wks_type,"pdf") || !strcmp(wks_type,"PDF") ||
!strcmp(wks_type,"ps") || !strcmp(wks_type,"PS")) {
/*
* Create a cairo PS/PDF workstation.
*/
NhlRLClear(srlist);
NhlRLSetString(srlist,NhlNwkFileName,"./nm05c");
NhlRLSetString(srlist,NhlNwkFormat,(char*)wks_type);
NhlCreate(&wid,"nm05Work",NhlcairoDocumentWorkstationClass,NhlDEFAULT_APP,srlist);
}
else if (!strcmp(wks_type,"png") || !strcmp(wks_type,"PNG")) {
/*
* Create a cairo PNG workstation.
*/
NhlRLClear(srlist);
NhlRLSetString(srlist,NhlNwkFileName,"./nm05c");
NhlRLSetString(srlist,NhlNwkFormat,(char*)wks_type);
NhlCreate(&wid,"nm05Work",NhlcairoImageWorkstationClass,NhlDEFAULT_APP,srlist);
}
/*
* Get Workstation ID.
*/
NhlRLClear(grlist);
NhlRLGetInteger(grlist,NhlNwkGksWorkId,&gkswid);
NhlGetValues(wid,grlist);
/*
* There's no HLU object for surface plots yet, so we need to call the
* LLUs to get a surface plot.
*/
gactivate_ws (gkswid);
/*
* Reverse the array indices for plotting with tdez2d, since
* c_dsgrid returns its array in column dominate order.
*/
for (i = 0; i < NX; i++) {
for (j = 0; j < NY; j++) {
outr[j][i] = output[i*NY+j];
}
}
c_tdez2d(NX, NY, xo, yo, &outr[0][0], rho, theta, phi, 6);
gdeactivate_ws (gkswid);
NhlFrame(wid);
/*
* Exponent equals 1.0
*/
c_dssetr("exp", 1.0);
output = c_dsgrid2s(NUM, xi, yi, zi, NX, NY, xo, yo, &ier);
if (ier != 0) {
printf(" Error %d returned from nm05c\n",ier);
exit(1);
}
gactivate_ws (gkswid);
/*
* Reverse the array indices for plotting with tdez2d, since
* c_dsgrid returns its array in column dominate order.
*/
for (i = 0; i < NX; i++) {
for (j = 0; j < NY; j++) {
outr[j][i] = output[i*NY+j];
}
}
c_tdez2d(NX, NY, xo, yo, &outr[0][0], rho, theta, phi, 6);
gdeactivate_ws (gkswid);
NhlFrame(wid);
/*
* Exponent equals 5.0
*/
c_dssetr("exp", 5.0);
output = c_dsgrid2s(NUM, xi, yi, zi, NX, NY, xo, yo, &ier);
if (ier != 0) {
printf(" Error %d returned from nm05c\n",ier);
exit(1);
}
gactivate_ws (gkswid);
/*
* Reverse the array indices for plotting with tdez2d, since
* c_dsgrid returns its array in column dominate order.
*/
for (i = 0; i < NX; i++) {
for (j = 0; j < NY; j++) {
outr[j][i] = output[i*NY+j];
}
}
c_tdez2d(NX, NY, xo, yo, &outr[0][0], rho, theta, phi, 6);
gdeactivate_ws (gkswid);
NhlFrame(wid);
/*
* NhlDestroy destroys the given id and all of its children.
*/
NhlDestroy(wid);
/*
* Restores state.
*/
NhlClose();
exit(0);
}
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